TM 55-2210-224-121-9. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)(6)ENGINE RADIATORS. Two radiators, one for each engine, keep engines at proper operating temperature.(7)SANDBOXES AND SAND CONTROLLERS. There are four sandboxes and sand controllers, one for each frontand rear wheel. The sand controllers are mounted underneath the sandboxes and deliver a metered amount ofsand to the front or rear driving wheels. The sand controller is controlled by the sander control valve.(8)BATTERY CHARGING ALTERNATORS. Two 32-volt, 60-amp, internally regulated alternators, one on eachengine, provide power for charging the batteries and operating low-voltage lights and controls.(9)TRACTION MOTORS. Four traction motors and gear boxes are axle hung and supported on the truck transomsby a suspension pad assembly. One motor is geared to each axle through a double gear reduction with a finalratio of 14.96: 1.(10)MAIN RESERVOIR AIR TANKS. Two main reservoir tanks, to the front and rear of the fuel tank, provide ameans of storing air for the air system.(11)BATTERY COMPARTMENT. The battery compartment is located beneath the cab, directly beneath thefireman's seat, and contains four batteries used for starting the engines.(12)FUEL TANK. The fuel tank can hold 400 gallons (1 514 liters) of diesel fuel for engine operation. Two fill pipesand two fuel level gages, one on each side of the locomotive, provide a means of filling the tank and monitoringthe level of fuel.(13)ELECTRICAL EQUIPMENT CABINET. Contains the automatic switching relays and contactors and is located inthe cab of the locomotive. Both high and low voltage are present in the electrical equipment cabinet when thelocomotive is in operation.1-5